The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 15, 2011
Filed:
Dec. 18, 2006
Clive Robert Giddis, Northwich, GB;
Paul Hendry Stewert, New Plymouth, NZ;
Clive Robert Giddis, Northwich, GB;
Paul Hendry Stewert, New Plymouth, NZ;
Mexichem Amanco S.A. de C.V., , MX;
Abstract
A process for the production of dichlorotrifluoroethane is described. The process comprises reacting perchloroethylene with hydrogen fluoride in the vapor phase at elevated temperature in at least one reactor in the presence of a fluorination catalyst to produce a composition comprising dichlorotrifluoroethane, hydrogen chloride, unreacted perchloroethylene and unreacted hydrogen fluoride. The composition that is produced is subjected to a separation step to recover a first fraction comprising dichlorotrifluoroethane and a second fraction comprising perchloroethylene and hydrogen fluoride. The second fraction is further separated into a hydrogen fluoride-rich fraction and a perchloroethylene-containing, organic-rich fraction which are then recycled. The dichlorotrifluoroethane that is recovered may be used to prepare pentafluoroethane.